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Growth and properties of ultrathin YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] layers

Conference · · AIP Conference Proceedings (American Institute of Physics); (United States)
OSTI ID:5722604
;  [1]
  1. Solid State Division, P.O. Box 2008, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6056 (United States)
+ Show Author Affiliations

We report on the superconducting properties of ultrathin [ital c]-axis-oriented YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] (YBCO) layers grown by pulsed-laser deposition. For single YBCO layers embedded in a PrBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] matrix, with a YBCO layer thickness as small as one unit cell, there is evidence of a superconducting transition. We also find that the superconducting properties of ultrathin YBCO layers can be significantly enhanced by use of more conductive buffer and cap layers. In particular, Pr[sub 0.5]Ca[sub 0.5]Ba[sub 2]Cu[sub 3]O[sub 7[minus][delta]]/YBCO/ Pr[sub 0.5]Ca[sub 0.5]Ba[sub 2]Cu[sub 3]O[sub 7[minus][delta]] ultrathin structures have transport properties superior to PrBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]]/YBCO/PrBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] including an increase in [ital T][sub [ital c]] and a narrower superconducting transition.

DOE Contract Number:
AC05-84OR21400
OSTI ID:
5722604
Report Number(s):
CONF-920944--
Journal Information:
AIP Conference Proceedings (American Institute of Physics); (United States), Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Vol. 273:1; ISSN 0094-243X; ISSN APCPCS
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL GROWTH
CUPRATES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FILMS
HIGH-TC SUPERCONDUCTORS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES